course Phy 121 ssignment #002002. `Query 2
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19:51:07 ** Questions about velocity, average velocity, acceleration, etc. are very confusing because so many of the concepts have similar definitions. People have trouble distinguishing things like average velocity, which for uniform acceleration can be obtained in a process that adds two velocities, from average acceleration, which involves subtracting two velocities; one of these processes involves dividing by 2 and the other dividing by the time interval `dt.
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RESPONSE --> ok
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19:51:36 That inevitably takes people a little time. But in the process you develop the habits you will need to succeed in the course. **
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RESPONSE --> ok
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19:52:14 ** Velocity is the rate of change of position. Acceleration is rate of change of velocity--change in velocity divided by the time period. To find the acceleration from a v vs. t graph you take the rise, which represents the change in the average velocity, and divide by the run, which represents the change in time. The average rate of change of velocity with respect to clock time is the same as the acceleration **
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RESPONSE --> Because acceleration is always happening so it is a rate of change. self critique assessment: 1
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19:52:31 If you know average acceleration and time interval what can you find?
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RESPONSE --> average velocity confidence assessment: 1
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19:53:54 Can you find velocity from average acceleration and time interval?
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RESPONSE --> displacement/time elapsed confidence assessment: 1
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19:54:12 Can you find change in velocity from average acceleration and time interval?
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RESPONSE --> yes confidence assessment: 1
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19:54:28 Can you find average velocity from average acceleration and time interval?
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RESPONSE --> yes confidence assessment: 1
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19:54:54 You can find only change in velocity from average acceleration and time interval. To find actual velocity you have to know at what velocity you started. Why can't you find average velocity from acceleration and time interval?
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RESPONSE --> I have no idea. confidence assessment: 0
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19:55:08 General College Physics only: Problem #10 Summarize your solution Problem 1.10 (approx. uncertainty in area of circle given radius 2.8 * 10^4 cm).
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RESPONSE --> ok confidence assessment: 0
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19:55:38 Query Add comments on any surprises or insights you experienced as a result of this assignment.
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RESPONSE --> i was alittle confused about one or two of the questions confidence assessment: 1
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19:57:16 Principles of Physics Students and General College Physics Students: Problem 14. What is your own height in meters and what is your own mass in kg, and how did you determine these?
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RESPONSE --> I know that I am 180lbs and 5'7"" but I do not know how to get that into meters and mass in kg. confidence assessment: 0
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